However, if you're determined to tackle it yourself, here's a general overview. This is NOT a complete guide, and you'll need a detailed repair manual specific to your year and model of Dodge Ram van. Failure to follow proper procedures can result in damage to your vehicle, and even injury to yourself.
General Steps (highly simplified, consult your repair manual for specifics):
1. Preparation:
* Disconnect the battery: This is crucial for safety.
* Gather tools: You'll need various sockets, wrenches, screwdrivers, pliers, possibly a coolant flush kit, a new heater core, and potentially a sealant for the core housing. A shop manual is essential.
* Drain the coolant: Completely drain the engine's cooling system. This is important to prevent a mess and coolant loss.
* Protect the interior: Cover the dashboard and surrounding areas with drop cloths to prevent damage.
2. Access the Heater Core:
* This is the most challenging part. You'll likely need to remove parts of the dashboard, possibly the glove box, and possibly even the steering column (depending on your specific model). Consult your repair manual for precise instructions. This often involves removing numerous screws, fasteners, and potentially disconnecting various electrical components. Take pictures as you go to aid in reassembly!
3. Remove the Old Heater Core:
* Once you have access, you'll need to disconnect the heater core hoses and carefully remove the core from its housing. Be prepared for coolant spillage. Use appropriate containers to catch the coolant.
4. Install the New Heater Core:
* Carefully install the new heater core into its housing, ensuring a proper seal.
5. Reassembly:
* Reassemble everything in the reverse order of disassembly. Pay close attention to your pictures and the repair manual.
6. Refill and Bleed the Cooling System:
* Refill the cooling system with the correct type and amount of coolant. Bleed the system to remove any air pockets. This is crucial to prevent overheating.
7. Testing:
* Run the engine and check for leaks. Test the heater to ensure it's working correctly.
Critical Considerations:
* Repair Manual: An accurate repair manual specific to your '85 Dodge Ram van is absolutely necessary. Generic instructions won't suffice.
* Coolant Type: Use the correct type of coolant recommended for your vehicle.
* Safety: Wear safety glasses and gloves. Coolant is corrosive.
* Patience: This is a lengthy and complex job. Be patient and methodical.
Again, I strongly advise against attempting this repair unless you possess significant automotive experience. The cost of a professional mechanic might be far less than the potential cost of damaging your van or injuring yourself. A mis-installed heater core can cause significant engine damage.
